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Thyroid Gland - Anatomy & Physiology (view source)
Revision as of 16:14, 10 December 2010
, 16:14, 10 December 2010Text replace - "[[Urinary System - Anatomy & Physiology" to "[[Urinary System Overview - Anatomy & Physiology"
===Iodine Uptake===
===Iodine Uptake===
Iodine circulates within the blood as Iodide (I-). It is actively transported into the follicular cells by an Na+/I- symport in the basal membrane. This pump concentrates iodine in the colloid at a level up to 250x greater than the plasma level. This process is known as ''Iodide Trapping.'' The pump is activated by Thyroid Stimulating Hormone (TSH) a hormone from the [[Pituitary Gland - Anatomy & Physiology|pituitary gland]].
Iodine circulates within the blood as Iodide (I-). It is actively transported into the follicular cells by an Na+/I- symport in the basal membrane. This pump concentrates iodine in the colloid at a level up to 250x greater than the plasma level. This process is known as ''Iodide Trapping.'' The pump is activated by Thyroid Stimulating Hormone (TSH) a hormone from the [[Pituitary Gland - Anatomy & Physiology|pituitary gland]].
Any excess iodide is excreted via the [[Urinary System - Anatomy & Physiology#Upper Urinary Tract|kidneys]].
Any excess iodide is excreted via the [[Urinary System Overview - Anatomy & Physiology#Upper Urinary Tract|kidneys]].
===Secretion of Thyroid Hormones===
===Secretion of Thyroid Hormones===